N-(tetracosenoyl)heptadecasphingosine-1-phosphocholine SM(d17:1/24:1(15Z)) 798.661 799.200 C46H91N2O6P CHEBI:137332 InChI=1S/C46H91N2O6P/c1-6-8-10-12-14-16-18-20-21-22-23-24-25-26-27-28-30-32-34-36-38-40-46(50)47-44(43-54-55(51,52)53-42-41-48(3,4)5)45(49)39-37-35-33-31-29-19-17-15-13-11-9-7-2/h20-21,37,39,44-45,49H,6-19,22-36,38,40-43H2,1-5H3,(H-,47,50,51,52)/b21-20-,39-37+/t44-,45+/m0/s1 LIPID_MAPS_instance:LMSP03010074 N-(15Z-tetracosenoyl)-heptadecasphing-4-enine-1-phosphocholine POQOEIGODOXWFL-HIMVLHDZSA-N [C@]([C@@](/C=C/CCCCCCCCCCCC)(O)[H])(NC(=O)CCCCCCCCCCCCC/C=C\CCCCCCCC)([H])COP(OCC[N+](C)(C)C)([O-])=O chebi_ontology